Passerelle du Lignon, Footbridge over the Rhône in Vernier, Geneva, Switzerland.

Passerelle du Lignon is a 136-metre stress-ribbon footbridge over the Rhône in the canton of Geneva, linking the Cité du Lignon in Vernier on the right bank to Loëx in Bernex on the left. Its deck is made of 74 lightly reinforced concrete slabs, each weighing eight tonnes, suspended from four 92 mm prestressing cables with a 5.5-metre sag at mid-span. An oil pipeline runs along the downstream side, outside the parapet.

The footbridge was built in 1971 by Sappro, the company operating a refined petroleum pipeline in Switzerland, to carry that pipeline across the Rhône where the river is 120 to 150 metres wide and no piers were allowed in the riverbed. The solution was a 136-metre stress-ribbon bridge with a 5.5-metre sag at midspan, with the pipeline mounted outside the parapet. The four 92 mm prestressing cables were pulled across first, then 74 precast concrete deck slabs of eight tonnes each were placed in eight days.

The walkway is also known as the Sappro footbridge, after the company that built it in 1971 to carry an oil pipeline across the Rhône. The pipeline runs along the outside of the parapet on the downstream side, so walkers cross beside it.

The deck is a 136-metre span-band structure with a 5.5-metre sag at mid-span, so the walk slopes down and back up between Loëx in Bernex and the Cité du Lignon in Vernier. The oil pipeline runs outside the parapet on the downstream side, leaving the walkway itself free for pedestrians.

The footbridge is a 136-metre stress-ribbon structure with a 5.5-metre sag at midspan, built without any pier in the riverbed where the Rhône is 120 to 150 metres wide. Its deck consists of 74 precast concrete slabs, each weighing eight tonnes, assembled in eight days in 1971. The oil pipeline runs outside the parapet on the downstream side.